According to Apple, the latest public release of iOS, sitting at iOS 10.2.1 and released just over four weeks ago, has taken significant steps to reduce the amount of unexpected shutdowns users are receiving on iPhone 6, iPhone 6s, iPhone 6 Plus, and iPhone 6s Plus.

The Cupertino-based company has been coming under fire over the last six months from those in ownership of a problematic device, with the company even acknowledging a problem exists and putting a replacement program in place for those affected devices. However, it seems that Apple is confident about iOS 10.2.1’s ability to fix the problem for certain device owners.

Apple isn’t claiming that iOS 10.2.1 has entirely eradicated the problem. After all, the repair and replacement program was put in place on the back of it being discovered that a certain batch of devices had internal battery packs which had been exposed to too much “controlled ambient air.”

A software update simply isn’t going to fix that, but it does address a separate issue with devices shutting down. With that said, according to a statement issued directly to TechCrunch, the official line is that iOS 10.2.1 has reduced unexpected shutdowns by 80-percent for iPhone 6s owners, and 70-percent for iPhone 6 owners:

With iOS 10.2.1, Apple made improvements to reduce occurrences of unexpected shutdowns that a small number of users were experiencing with their iPhone. iOS 10.2.1 already has over 50% of active iOS devices upgraded and the diagnostic data we’ve received from upgraders shows that for this small percentage of users experiencing the issue, we’re seeing a more than 80% reduction in iPhone 6s and over 70% reduction on iPhone 6 of devices unexpectedly shutting down.

Interestingly enough, those downloading and installing iOS 10.2.1 weren’t even aware that Apple had taken steps to try and solve the problem. A silent fix put in place has allowed the company to collect data behind-the-scenes and determine if the patch was actually making things better. Given these stats, it looks as though it definitely is.